Another thing, which came up to my mind during browsing this website ... if Earth is really flat ... what is on its edges? I found some potential maps of flat Earth on local wiki, but you cannot be serious with ice walls, right? Other maps showing Antarctica as distant continent has clearly edges showed so this is not clear to me.
I also found some topic here on forum asking same question 3 years ago and this person in my opinion did not get his answer until now, so I am asking again.
Just to be clear, I am not offending anyone here as I found out this theory very interesting, but content of this website still not convinced me to believe it.